( *49' ) 
ber againft Unit in the Table ftoin Penny.weights to 
Ounce?, and the Produft is the Charaderiftick 
Number of this Stone. Proceeding therefore as in 
the firft Inftance, the Weight it will fuftain will be 
found. 
Xhe ColuiTQn of Pounds is only ufeful where a 
Loadftone's Weight exceeds forty Pound, or 480 
Ounces, in which Cafe the fame Method muft be ufed 
as in the others. 
To know how many times a Loadflone will take 
up its own Weight, multiply the Number proper to the 
Denomination in Ufe, by the Number in the firft Co- 
lumn (entituled, How often its Weight) which is 
againft the Weight of the Stone in the Column of 
that Denomination. 
His Lordfhip clofes his Account with explaining the 
Ufe of the Tables relating to the Value of Loadftones 
in Money ^ and this he fuppofes to be in the compound 
Proportion of the Goodnefs of the Stone, and of the 
Weight it fuftains j becaufe if two Loadftones take 
up the fame Weight, the lefTer is more valuable, as 
it does more in Proportion to its Bulk, and what bet- 
ter Rule to eftimate the Value by, than the Goodnefs 
of the Stone? On the other Hand, if the Stones are 
in Nature equally good, but fuftain different Weights, 
it is reafonable, 'that their Value ftiould be according 
to the Weights they fuftain. Both thefe Circumftances 
therefore being confidered together, in order to find the 
yalue of any Loadftone by the Tables, we muft mul- 
tiply the charaderiftick Number for the Stone, by the 
Number entituled. Value in Money, taking this Value 
in Money from the particular Denomination that the 
Stone comes under ; and , this Produd will be the Va- 
lue, per Ounce, of what the Stone fuftains. - Then mul- 
tiplying; 
